CN213874513U

CN213874513U - Pressure sensor assembly for gas flowmeter

Info

Publication number: CN213874513U
Application number: CN202023277971.0U
Authority: CN
Inventors: 肖云巩; 黄智慧; 陈先岭; 吴克宏
Original assignee: Zhejiang Cangnan Instrument Group Co ltd
Current assignee: Zhejiang Cangnan Instrument Group Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-03
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a pressure sensor subassembly for gas flowmeter, including sensor element and metal collapsible tube, the welding has the cable conductor on the sensor element, the metal collapsible tube cover is established at the cable conductor outside, still including the sensing seat, compress tightly the plug screw, cable screwing piece and outer cover are established on the cable conductor along sensor element to the metal collapsible tube direction cover in proper order, sensing seat head is equipped with and gets the pressure joint, sensing seat afterbody is equipped with the sensing chamber, sensor element presses through compressing tightly the plug screw and establishes in the sensing chamber, compress tightly the plug screw and constitute sealed setting with the sensing seat, compress tightly the plug screw, outer cover cup joints with metal collapsible tube in proper order, the cable is screwed the piece and is located inside compressing tightly the plug screw, outer cover respectively with compress tightly the plug screw, metal collapsible tube constitutes sealed setting, the metal collapsible tube afterbody is equipped with out the crimping head. The utility model provides a pressure sensor subassembly, the cable conductor is screwed fixedly through the cable, and the subassembly whole sealing is reliable, can cooperate the long-term use of flowmeter at industrial field.

Description

Pressure sensor assembly for gas flowmeter

Technical Field

The utility model relates to a pressure sensor subassembly for gas flowmeter.

Background

The gas flowmeter is mainly used for measuring the volume flow of gas and is an important measurement product for natural gas industrial pipeline transmission and trade settlement. In order to realize accurate and reliable metering, pressure correction and compensation operation of gas in the pipeline are required, and the flowmeter is required to be provided with a corresponding pressure sensor assembly. The existing pressure sensor assembly is formed by welding a cable wire on a sensor element and then combining the sensor element with parts such as a metal hose and the like, and is required to be verified according to JJG860 regulations to determine that all general and metering performance indexes meet requirements, and after the verification is qualified, the pressure sensor assembly is installed on a gas flowmeter to carry out further overall machine inspection and test.

However, the above-mentioned pressure sensor package does not ensure the weld line attachment of the pressure sensor element and the adequate sealing of the exterior of the package throughout the production process.

Disclosure of Invention

The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a pressure sensor assembly for gas flowmeter, the subassembly whole seal is reliable, can cooperate the long-term use of flowmeter at industrial field.

The technical scheme of the utility model: a pressure sensor assembly for a gas flowmeter comprises a sensor element and a metal hose, wherein a cable is welded on the sensor element, the metal hose is sleeved outside the cable, and also comprises a sensing seat, a pressing plug screw, a cable tightening piece and an outer sleeve, the compaction screw plug, the cable tightening piece and the outer thread sleeve are sequentially sleeved on the cable wire along the direction from the sensor element to the metal hose, the head part of the sensing seat is provided with a pressure taking joint, the tail part of the sensing seat is provided with a sensing cavity, the sensor element is pressed in the sensing cavity through a pressing screw plug, the compaction screw plug and the sensing seat form a sealed arrangement, the compaction screw plug, the outer sleeve and the metal hose are sequentially sleeved, the cable is screwed the piece and is located and compresses tightly the inside cable conductor that is used for of plug screw, the outer swivel nut constitutes sealed the setting with compressing tightly plug screw, metal collapsible tube respectively, the metal collapsible tube afterbody is equipped with out the crimping head.

Adopt above-mentioned technical scheme, the utility model discloses a pressure sensor subassembly, with on the sensor element behind the welding cable conductor, the cable conductor passes in proper order and compresses tightly plug screw and cable screwing member, impresses the sensor element in the sensing intracavity by compressing tightly the plug screw, compresses tightly the plug screw and seals with the sensing seat to screw up the cable and screw a nut, with locking the cable conductor, accomplish the debugging back, outer thread bush and metal collapsible tube are established to the repacking, outer thread bush constitutes sealed the setting with compressing tightly plug screw, metal collapsible tube respectively, and the subassembly is whole sealed reliable, can cooperate the long-term use of flowmeter at industrial field.

The utility model discloses a further setting again: the sensor is characterized in that a pressing head is arranged at the head of the pressing plug screw, the outer diameter of the pressing plug screw is larger than that of the pressing head to form a shoulder step A, the sensor element is pressed in a sensing cavity through the pressing head, the pressing head and the sensing cavity form threaded fit, a sealing ring A is sleeved on the pressing head, and the sealing ring A is pressed on the shoulder step A through a sensing seat.

By adopting the above further arrangement, the compression screw plug is screwed into the sensing cavity through the compression head, so that the fixed installation of the compression screw plug and the sensing seat is realized, the installation structure is simple, the sealing ring A is pressed on the shoulder step A through the sensing seat, the sealing arrangement of the compression screw plug and the sensing seat is formed, and the sealing performance is good.

The utility model discloses a further setting again: the tail of the compression screw plug is provided with a screw plug connector, the outer diameter of the compression screw plug is larger than that of the screw plug connector to form a shoulder step B, the head of the outer sleeve is sleeved outside the screw plug connector and forms threaded fit, the screw plug connector is sleeved with a sealing ring B, and the sealing ring B is pressed on the shoulder step B through the outer sleeve.

By adopting the above further arrangement, the external thread sleeve is in thread fit with the compression screw plug, and the sealing ring B is pressed on the shoulder step B through the external thread sleeve, so that the sealing arrangement of the external thread sleeve and the shoulder step B is formed, and the sealing performance is good.

The utility model discloses a still further set up: be equipped with sealed the pad between outer swivel nut and metal collapsible tube, sealed pad head is equipped with sealed head, and sealed external diameter that fills up is greater than the external diameter formation shoulder step C of sealed head, the outer swivel nut afterbody is equipped with the swivel nut joint, the swivel nut joint is equipped with the sealed chamber that can supply sealed head to install, the metal collapsible tube head is equipped with hose nipple, the hose nipple cover is established outside the swivel nut joint.

By adopting the further arrangement, the outer thread sleeve and the metal hose are sealed by the sealing gasket, so that the sealing performance is good.

The utility model discloses a still further set up: the sensor element is sleeved with a sealing ring C, and the sensor element and the inner wall of the sensing cavity are sealed through the sealing ring C.

With the above still further arrangement, the sealing between the sensor element and the sensing chamber is good.

The utility model discloses a still further set up: and a sealing ring D is arranged between the cable screwing piece and the inner wall of the compression screw plug, so that the cable screwing piece and the compression screw plug are in sealing fit.

With the above further arrangement, the cable tightening member and the compression plug have good sealing performance.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a structural diagram of a compression plug according to an embodiment of the present invention;

FIG. 4 is a diagram of a gasket according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a pressure sensor assembly according to an embodiment of the present invention for use with a flow meter.

The sensor comprises a sensor element 100, a metal hose 200, a cable 300, a sensing seat 400, a compression screw plug 500, a cable tightening piece 600, an outer thread sleeve 700, a pressure tapping joint 410, a pressure tapping joint 210, a compression head 510, a shoulder step A520, a sealing ring A810, a screw plug joint 530, a shoulder step B540, a sealing ring B820, a sealing gasket 900, a sealing head 910, a shoulder step C920, a screw sleeve joint 710, a hose joint 220, a sealing ring C830 and a sealing ring D840; the volume corrector a is arranged on the base meter shell b.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the descriptions related to "a", "B", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

As shown in fig. 1-4, the pressure sensor assembly for a gas flowmeter of the present invention comprises a sensor element 100 and a metal hose 200, wherein a cable 300 is welded on the sensor element 100, the metal hose 200 is sleeved outside the cable 300, the pressure sensor assembly further comprises a sensor base 400, a pressing plug 500, a cable tightening member 600 and an outer sleeve 700, the pressing plug 500, the cable tightening member 600 and the outer sleeve 700 are sequentially sleeved on the cable 300 along a direction from the sensor element 400 to the metal hose 200, the head of the sensor base 400 is provided with a pressure tapping joint 410, the tail of the sensor base 400 is provided with a sensing cavity, the sensor element 100 is pressed in the sensing cavity by the pressing plug 500, the pressing plug 500 and the sensor base 400 form a sealing arrangement, the pressing plug 500, the outer sleeve 700 and the metal hose 200 are sequentially sleeved, the cable tightening member 600 is located inside the pressing plug 500 and used for locking the cable 300, the outer sleeve 700, the compression plug screw 500 and the metal hose 200 are respectively arranged in a sealing manner, and the tail part of the metal hose 200 is provided with a compression joint 210; the head of the compression screw plug 500 is provided with a compression head 510, the outer diameter of the compression screw plug 500 is larger than that of the compression head 510 to form a shoulder A520, the sensor element 100 is pressed in a sensing cavity through the compression head 510, the compression head 510 and the sensing cavity form thread fit, a sealing ring A810 is sleeved on the compression head 510, and the sealing ring A810 is pressed on the shoulder A520 through a sensing seat 400; the tail of the compression screw plug 500 is provided with a screw plug joint 530, the outer diameter of the compression screw plug 500 is larger than that of the screw plug joint 530 to form a shoulder B540, the head of the outer sleeve 700 is sleeved outside the screw plug joint 530 and forms thread fit, the screw plug joint 530 is sleeved with a sealing ring B820, and the sealing ring B820 is pressed on the shoulder B540 through the outer sleeve 700; a sealing gasket 900 is arranged between the outer threaded sleeve 700 and the metal hose 200, a sealing head 910 is arranged at the head of the sealing gasket 900, the outer diameter of the sealing gasket 900 is larger than that of the sealing head 910 to form a shoulder step C920, a threaded sleeve joint 710 is arranged at the tail of the outer threaded sleeve 700, a sealing cavity for the sealing head 910 to be arranged is arranged on the threaded sleeve joint 710, a hose joint 220 is arranged at the head of the metal hose 200, and the hose joint 220 is sleeved outside the threaded sleeve joint 710; a sealing ring C830 is sleeved on the sensor element 100, and the sensor element 100 and the inner wall of the sensing cavity are sealed through the sealing ring C830; a sealing ring D840 is arranged between the cable screwing piece 600 and the inner wall of the compression plug screw 500, and sealing fit between the cable screwing piece 600 and the compression plug screw 500 is achieved.

The utility model discloses a pressure sensor subassembly, install in the sensing chamber of sensing seat 400 behind welding cable conductor 300 on sensor element 100, sensor element 100 and sensing chamber are sealed through seal ring C830, overlap in proper order on cable conductor 300 and establish pressure plug screw 500 and cable spiral shell spare 600, by the hold-down head 510 screw in sensing chamber and compress tightly sensor element 100 of pressure plug screw 500, realize the fixed mounting of pressure plug screw 500 and sensing seat 400, and press sealing washer A810 through sensing seat 400 and establish on shoulder rank A520, constitute and compress tightly plug screw 500 and the sealed setting of sensing seat 400, and screw up cable spiral shell spare 600 nut, in order to lock cable conductor 300, seal through seal ring D840 between cable spiral shell spare 600 and the pressure plug screw 500 inner wall, accomplish the debugging after; an outer sleeve 700, a sealing gasket 900 and a metal hose 200 are sequentially sleeved on the cable 300, the outer sleeve 700 is sleeved outside the plug screw joint 530 and screwed tightly through threads, so that the outer sleeve 700 and the compression plug screw 500 are fixedly installed, the sealing ring B820 is pressed on the shoulder step B540 through the outer sleeve 700, the outer sleeve 700 and the compression plug screw 500 are hermetically arranged, the hose joint 220 is sleeved outside the plug screw joint 710, and the sealing gasket 900 is pressed with the plug screw joint 710 through the hose joint 200, so that the sealing arrangement of the outer sleeve 700 and the compression plug screw 500 is realized, the whole sealing of the assembly is reliable, and the assembly can be matched with a flowmeter to be used in an industrial field for a long time.

As shown in fig. 5, when the flowmeter is used, the volume correction instrument a and the pressure sensor module are mounted on the base meter case b, the pressure sampling joint 410 of the pressure sensor module is connected to the base meter case b, and the pressure output joint 210 is connected to the volume correction instrument a.

Claims

1. The utility model provides a pressure sensor subassembly for gas flowmeter, includes sensor element and metal collapsible tube, the last welding of sensor element has the cable conductor, the metal collapsible tube cover is established outside the cable conductor, its characterized in that: still including the sensing seat, compress tightly plug screw, cable screwing piece and outer cover, it establishes on the cable conductor in proper order to the metal collapsible tube direction along sensor element to compress tightly plug screw, cable screwing piece and outer cover, the sensing seat head is equipped with gets and presses the joint, the sensing seat afterbody is equipped with the sensing chamber, sensor element presses through compressing tightly the plug screw and establishes at the sensing intracavity, compress tightly the plug screw and constitute sealed setting with the sensing seat, it cup joints in proper order to compress tightly plug screw, outer cover and metal collapsible tube, the cable screws the piece and is located and compresses tightly the inside locking cable conductor that is used for of plug screw, outer cover respectively with compress tightly plug screw, metal collapsible tube constitute sealed setting, the metal collapsible tube afterbody is equipped with out the crimping head.

2. A pressure sensor assembly for a gas meter as defined in claim 1, wherein: the sensor is characterized in that a pressing head is arranged at the head of the pressing plug screw, the outer diameter of the pressing plug screw is larger than that of the pressing head to form a shoulder step A, the sensor element is pressed in a sensing cavity through the pressing head, the pressing head and the sensing cavity form threaded fit, a sealing ring A is sleeved on the pressing head, and the sealing ring A is pressed on the shoulder step A through a sensing seat.

3. A pressure sensor assembly for a gas meter according to claim 1 or 2, characterized in that: the tail of the compression screw plug is provided with a screw plug connector, the outer diameter of the compression screw plug is larger than that of the screw plug connector to form a shoulder step B, the head of the outer sleeve is sleeved outside the screw plug connector and forms threaded fit, the screw plug connector is sleeved with a sealing ring B, and the sealing ring B is pressed on the shoulder step B through the outer sleeve.

4. A pressure sensor assembly for a gas meter according to claim 1 or 2, characterized in that: be equipped with sealed the pad between outer swivel nut and metal collapsible tube, sealed pad head is equipped with sealed head, and sealed external diameter that fills up is greater than the external diameter formation shoulder step C of sealed head, the outer swivel nut afterbody is equipped with the swivel nut joint, the swivel nut joint is equipped with the sealed chamber that can supply sealed head to install, the metal collapsible tube head is equipped with hose nipple, the hose nipple cover is established outside the swivel nut joint.

5. A pressure sensor assembly for a gas meter according to claim 1 or 2, characterized in that: the sensor element is sleeved with a sealing ring C, and the sensor element and the inner wall of the sensing cavity are sealed through the sealing ring C.

6. A pressure sensor assembly for a gas meter according to claim 1 or 2, characterized in that: the sensor element is sleeved with a sealing ring C, and the sensor element and the inner wall of the sensing cavity are sealed through the sealing ring C.

7. A pressure sensor assembly for a gas meter according to claim 1 or 2, characterized in that: and a sealing ring D is arranged between the cable screwing piece and the inner wall of the compression screw plug, so that the cable screwing piece and the compression screw plug are in sealing fit.